Shears



(No Model.)

W. T. RUNYAN. SHEARS.

No. 596,546. Patented Jan.4,1898.

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UNITED STATES PATENT OFFICE.

WILLIAM T. RUNYAN, OF CANTON, OHIO.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 596,546, dated January 4, 1898.

` Application led August 5, 1897. Serial No. 647,163. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM ,'I. RUNYAN, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Shears; and I do hereby de.- clare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the gures of reference marked thereon, in which Figure 1 is a view showing the shears applied to use. Fig. 2 is a perspective view of the shears, showing the blades open. Fig. 3 is a detached view showing one of the blades and a portion of its handle. Fig. 4 is a view of one of the blades and its handle. Fig. 5 is an edge view of the male cutting-blade. Fig. 6 is a transverse section through line @c x, Fig. 3. Fig. 7 is a transverse section through line y y, Fig. 4. Fig. S is a view showing a portion of the pipe partially out.

The present invention has relation to shears especially designed for transversely cutting corrugated conductor-pipes; and it consists in the novel construction hereinafter de? scribed, and particularly pointed out in the claim.

Similar numbers of reference indicate correspending parts in all the gures of the drawings. In the accompanying drawings, 1 and 2 represent the handles, which are connected together in the ordinary manner by means of the cross rivet or bolt 3.

The handlesl and 2'are extended beyond their pivotal points to form the blades 4 and 5, the blade 5 being the female blade and the blade 4 the male one.' The female blade 5 is substantially of the form shown, and as shown it is provided with the elongated opening 6. The extreme outer end of the female blade 5 is provided with the downward-curved portion 7, which curved portion is for the purpose hereinafter described. The blade 5 is provided upon its cutting edge or face with the concaved portions 8 and 9 and the convexed portion 10, said convexed portion being located between the concaved portions 8 and 9. The blade 4 is provided with the two concaved portions 11 and 12 and the oonvexed portions 13 and 14, the convexed and concaved portions of the respective blades being located directly opposite each other when the shear-blades are properly connected, as illustrated in Figs. 1 and:2.

For the purpose of providing a means for starting acut the blade 4 is provided with a point 15, which can be forced through the lnetal, thereby providing a means for bringing the blade 4 into proper position to act upon the inner periphery of the conductorpipe. The conoaved and convexed edges of the cutting-blades 4 and 5 VareY formed of a shape and size to correspond substantially with the shape and size of the corrugations formed in the standard make of conductorpipes, thereby providing atool that can be used regardless of the particular brand of corrugated conductor-pipes designed to be operated upon. It will be understood that by the formation of the male and female blades a strip will be cut from the conductor-pipe, and for the purpose of providing a means for clearing the strip as it is out the blade 4 is tapered longitudinally upon its cutting edge, as illustrated in Fig. 5, the wider portion of the cutting-blade being at the outer end and the narrower portion being toward the pivotal point of said blade. For the purpose of providing room for the strip to be passed the upper portion of the opening in the female blade is formed wider, as illustrated in Fig. 7, the narrow portion of the opening being below the ledges 17.

For the purpose of automatically opening the shears the spring 17 a is provided, which spring is constructed and attached in the ordinary manner. It will be understood that `by providing the downward-curved portion 7 on the female blade and locating it as shown it will be in position to embrace the convexed portion of the corrugation, as illustrated in Fig. 1, thereby preventing the shears from moving endwise and at the same time holding the shears so that as the blades approach each other they will cut the material forming the conductor pipe without marring it in any manner or changing the formation of the conductor-pipe, by which arrangement dierent sections can be placed together easily and without trouble. The cutting-blade 4 is tapered transversely, as illustrated in Fig. 6, and is so tapered for the purpose of assisting IOO in providing sufficient room to clear the strip being out out of the Conductor-pipe.

For the purpose of providing va better shear out as the blades are brought together the eonoaved portions of the blade 5 are formed of less curvature than the convexed portions.

of the blade et.

Having fully described my invention, what I claim as new, and desire to sec-ure by Letters Patent, is-

As an improved article of manufaotu re, shears for cuttin g corrugated conductor-pi pe,

Consisting of the handles l and 2, pivoted together, the blades 4 and 5, the blade 5 provided with the opening 6, and the ledges 17, and the curved portion 7, the blade 4' tapered longitudinally and transversely, and each of the blades provided With eorrugations on their meeting or Cutting edges, substantially as and for the purpose speoied.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two Witnesses.

WILLIAM T. RUNYAN.

Witnesses:

MAGGIE RUNYAN, F'. W. BOND. 

